Backlash (Regular Rotation Model); Measuring The Forward And Reverse Gear Backlash - Yamaha 200A Service Manual

LOWR
2. Calculate the lower case standard(R/100).
NOTE:
• "R" A stamped on the trim tab mounting face
refers to the deviation of the lower case di-
mension from the standard. The numeral is
in 1/100mm.
• If the numeral is unknown, assume that "R"
is zero, and check the backlash when the unit
is assembled. Readjustment shall be made
if the backlash is out of specification.
3. Calculate the reverse gear shim thickness.
Calculation formula:
Reverse gear shim thickness
(T2) = M2 - 29.00 - R/100
Example:
If "M2"= 30.50, and "R"= –5, then :
T2 = 30.50 – 29.00 – (–5/100)
= 30.50 – 29.00 + 0.05
= 1.45
4. Select the reverse gear shim(s) as follows.
Calculated numeral
at 1/100 place
1,2
3,4,5
6,7,8
9,10
Available shim thickness:
0.10, 0.12, 0.15, 0.18, 0.30, 0.40, 0.50
Example:
If "T2" is 1.16mm, then the reverse gear
shim is 1.15 mm.
If "T2" is 1.20mm, then the reverse gear
shims is 1.18 mm.
6-31
Lower unit
S69j6585
Rounded numeral
0
2
5
8

Backlash (regular rotation model)

NOTE:
• Measure the backlash before installing the
water pump.
• Set the gear shift in neutral position for the
measurement.
• Measure the backlash for both forward and
reverse gears.
Measuring the forward and reverse
gear backlash
1. Set the gear shift in neutral.
Shift rod push arm: 90890-06052
2. Secure the propeller shaft by pressing it by
the special tool.
NOTE:
Tighten the center bolt to the specified torque.
Center bolt 2:
5 N • m (0.5 kgf • m, 4 ft • lb)
Bearing housing puller claw L 1:
90890-6502
Center bolt 2: 90890-06504
Stopper guide plate 3: 90890-06501
S69j6635
60h60660
60H5E11